[scrps]

The one upside to this being based on open standards also means that there is no reason this tech can't be used against say, police, politicians, executives.

Though I'd like to actually look at how it is practically done first, for all I know this could require more than just access to an AP. This is not my area of expertise so maybe someone that is an expert can confirm my intuition that beamforming even on enterprise grade access points isn't locative (if that is the right word?) enough on it's own, I'd imagine this would require some type of kit to be deployed in order to accurately map a room?

Also plaster walls or at least my plaster walls seem to be great at blocking anything over 2.4GHz :\

[cperciva]

It's probably not the plaster blocking the signal, but rather a wire mesh which was put up to support the plaster.

[scrps]

Here is where it gets interesting... No mesh, it is lath and plaster. I've had to cut into it in a few rooms and if there is a mesh I have yet to see it. I am wondering what was used in the plaster at this point.

[cperciva]

Huh. I know lime plaster can contain significant levels of iron impurities, but I think even in the worst case those would be low enough to have an insignificant effect. Now I'm really curious too.

[scrps]

This is an interesting read:

https://blog.ibwave.com/a-closer-look-at-attenuation-across-...

I am tempted to disolve a bit of the plaster and run a conductivity test on it for fun. It is like living in a leaky faraday cage.